Uber is transitioning its query architecture from Neutrino, an internal Presto-based system, to a new design centered around Apache Pinot's Multi-Stage Engine Lite Mode. This shift aims to simplify query handling while enhancing performance and reliability, allowing for advanced SQL features without the complications of layered architectures. The new architecture, which includes a lightweight passthrough proxy called Cellar, supports various query languages and provides users with better control over their data analytics capabilities.